CN116686175A - Encoder outlet structure and encoder - Google Patents

Abstract

The wire outlet structure of the encoder includes an encoder housing (10), a metal ring (20), a fixing piece (30), a first O-ring (40) and a second O-ring (50). The encoder housing is formed with a first wire hole (12). The metal ring is arranged in the first wire hole and can tighten the shielding layer. A second wire hole (32) is formed on the fixing piece, and the fixing piece can be inserted into the first wire hole from the outside of the encoder housing with interference. The first O-ring can be sleeved on the fixing part and seal the gap between the fixing part and the encoder housing. The second O-ring is arranged in the second wire hole and can seal the gap between the fixing piece and the cable. The second O-ring can also apply elastic force to the metal ring after the fixing piece is inserted into the first wire hole to keep the metal ring in place. against the encoder housing. The outlet structure is more compact, and a larger bending space is reserved for the encoder outlet. The present invention also provides an encoder with the above-mentioned outlet structure.

Description

Encoder outlet structure and encoder

technical field

The present invention relates to a wire outlet structure, especially a wire outlet structure for an encoder, and also relates to an encoder with the above wire outlet structure.

Background technique

The signal cable of the motor encoder has high requirements on sealing and electromagnetic shielding, and the signal cable usually adopts the outlet method of the cable gland. If the installation space reserved for the encoder in the motor is too small, and the minimum bending radius of the cable must be met at the same time, it is difficult for the commonly used cable glands to meet the requirements.

Contents of the invention

The purpose of the present invention is to provide an encoder outlet structure, which is more compact and reserves a larger bending space for the encoder outlet.

Another object of the present invention is to provide an encoder with a more compact structure for outgoing wires, and a larger bending space is reserved for outgoing wires.

The invention provides an encoder outlet structure, which includes an encoder housing, a metal ring, a fixing piece, a first O-ring and a second O-ring. The encoder housing is formed with a through first wire hole through which cables can pass. The metal ring is arranged in the first wire hole and can be sleeved on the shielding layer of the cable. The metal ring can deform under the action of external force and tighten the shielding layer. A through second wire hole is formed on the fixing part, and the cable can pass through the second wire hole, and the fixing part can be inserted into the first wire hole from the outside of the encoder housing with interference for fixing. The first O-ring can be sleeved on the fixing part, and the first O-ring can seal the gap between the fixing part and the encoder housing after the fixing part is inserted into the first wire hole. The second O-ring is arranged in the second wire hole and can be sleeved on the cable. The second O-ring can seal the gap between the fixing member and the cable, and the second O-ring can also be inserted into the first fixing member. The elastic force is applied to the metal ring behind the wire hole to keep the metal ring against the encoder housing along the insertion direction of the fixing member.

The wire outlet structure of the encoder provided by the present invention has a fixing piece that can be inserted into the encoder housing with interference and a metal ring that can tighten the shielding layer. The wire outlet structure is connected to the second O-ring and the metal ring by the fixing piece The cable is fixed to the encoder housing, and the metal ring abuts against the encoder housing to enhance the ability to shield electromagnetic interference. The outlet structure also seals the gap between the fixing part and the encoder housing through the first O-ring, and seals the gap between the fixing part and the cable through the second O-ring, thereby achieving an IP67-level sealing effect. The wire outlet structure provided by the present invention does not need to protrude from the encoder housing, the structure is more compact, and a larger bending space is reserved for the wire outlet of the encoder.

In yet another exemplary embodiment of the wire outlet structure of the encoder, the wire outlet structure further includes an abutment ring, the inner diameter of the abutment ring is smaller than the outer diameter of the metal ring and the outer diameter of the second O-ring, and the abutment ring The outer diameter is larger than the outer diameter of the metal ring and the outer diameter of the second O-ring, the abutment ring is arranged in the second wire hole and can be sleeved on the cable, and the abutment ring is arranged on the second O-ring along the insertion direction of the fixing member. between the ring and the metal ring. The abutment ring can prevent the second O-ring from slipping between the metal ring and the second wire hole, thereby improving the sealing effect of the wire outlet structure.

In yet another exemplary embodiment of the wire outlet structure of the encoder, the encoder housing has an abutment surface perpendicular to the insertion direction of the fixing member and facing the outside of the encoder housing in the first wire hole, and the second The O-ring can apply an elastic force to the metal ring along the inserting direction of the fixing piece to keep the metal ring against the abutment surface. The abutting surface can stably support the metal ring, thereby ensuring a stable position of the metal ring.

In another exemplary embodiment of the wire outlet structure of the encoder, the fixing part shrinks at the opening of one end of the second wire hole to form an abutment part, and the diameter of the second wire hole at the abutment part is equal to the diameter of the cable. After the fixing piece is inserted into the first wire hole, the abutting portion can abut against the second O-ring along the insertion direction of the fixing piece. The abutting part can narrow the gap between the fixing part and the cable, and at the same time, the fixing part can apply force to the second O-ring evenly through the abutting part.

In another exemplary embodiment of the wire outlet structure of the encoder, the first wire hole has a fixed hole section, the section of the fixed hole section perpendicular to the insertion direction of the fixing piece is circular, and the diameter of the section is along the direction of the fixing piece. The direction of insertion gradually decreases. This structure of the encoder housing is easy to process and can facilitate the insertion of the fixing member.

In another exemplary embodiment of the wire outlet structure of the encoder, the fixing member is in the shape of a truncated cone, and the second wire hole is coaxial with the fixing member. This structure of the fixing member facilitates processing and enables easy insertion into the first wire hole.

In another exemplary embodiment of the wire outlet structure of the encoder, a first annular groove coaxial with the fixing element is formed on the side of the fixing element, and the first O-ring is sleeved in the first annular groove. The first annular groove can prevent the first O-ring from sliding relative to the fixing member when the fixing member is inserted into the first wire hole, thereby improving the sealing effect of the wire outlet structure.

In another schematic embodiment of the wire outlet structure of the encoder, the fixing part is formed with a second annular groove coaxial with the fixing part on the side, and after the fixing part is inserted into the first wire hole, the second annular groove A sealed cavity is enclosed with the inner surface of the first line hole. The fixing part is also formed with two communicating grooves on the side. After the fixing part is inserted into the first line hole, each communicating groove and the inner surface of the first line hole form a communicating cavity, and each communicating cavity communicates with the sealing cavity and the fixing part. The surface facing the outside of the encoder housing. After the fixing part is inserted into the first wire hole, sealant can be injected into the sealing chamber through the communication chamber, thereby further improving the sealing effect of the wire outlet structure.

In another schematic embodiment of the wire outlet structure of the encoder, the outer surface of the encoder housing is a plane perpendicular to the insertion direction of the fixing member around the opening of the first wire hole, and when the fixing member is inserted into the first wire hole Finally, the surface of the fixing member facing the outside of the encoder housing is coplanar with the outer surface of the encoder housing. In this way, it is convenient to confirm whether the fixing member is installed in place, and it can ensure that the outgoing line structure is beautiful.

The present invention also provides an encoder, which includes a cable and the above-mentioned outlet structure. The cable can pass through the first wire hole, the metal ring is set in the first wire hole and can be sleeved on the shielding layer of the cable, the metal ring can deform under the action of external force and tighten the shielding layer of the cable, the cable The second O-ring can pass through the second wire hole, the second O-ring is arranged in the second wire hole and can be sleeved on the cable, and the second O-ring can seal the gap between the fixing part and the cable. The outgoing wire structure of the encoder is compact, and a large bending space is reserved for the outgoing wire of the encoder.

Description of drawings

The following drawings only illustrate and explain the present invention schematically, and do not limit the scope of the present invention.

Fig. 1 is an exploded schematic diagram of an exemplary embodiment for explaining an outlet structure of an encoder.

FIG. 2 is a schematic diagram of an assembly structure for illustrating an outlet structure of an encoder.

FIG. 3 is a schematic partial cross-sectional view of an outlet structure of the encoder in FIG. 2 .

Fig. 4 is a schematic structural view of the fixing member.

Fig. 5 is a schematic partial cross-sectional view illustrating another exemplary embodiment of an encoder outlet structure.

Label description

10 Encoder housing

12 first line hole

13 fixed hole section

14 abutment surface

20 metal rings

30 fixing parts

32 second line hole

34 abutment

35 first annular groove

36 second annular groove

37 sealed cavity

38 connected grooves

39 connecting cavity

40 first o-ring

50 second o-ring

60 abutment ring

70 cables

72 shielding layer

Insertion direction of A fixing piece

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings, in which the same reference numerals represent components with the same or similar structures but the same functions.

In this article, "schematic" means "serving as an example, example or illustration", and any illustration or implementation described as "schematic" should not be interpreted as a more preferred or more advantageous Technical solutions.

Fig. 1 is an exploded schematic diagram of an exemplary embodiment for explaining an outlet structure of an encoder. FIG. 2 is a schematic diagram of an assembly structure for illustrating an outlet structure of an encoder. Referring to FIG. 1 and FIG. 2 , the wire outlet structure of the encoder includes an encoder housing 10 , a metal ring 20 , a fixing member 30 , a first O-ring 40 and a second O-ring 50 .

FIG. 3 is a schematic partial cross-sectional view of an outlet structure of the encoder in FIG. 2 . Referring to FIG. 2 and FIG. 3 , the encoder housing 10 is formed with a through first wire hole 12 through which the cable 70 can pass. The metal ring 20 is disposed in the first wire hole 12 and can be sleeved on the shielding layer 72 of the cable 70. The metal forming the metal ring 20 is soft and thin, so that the metal ring 20 can be deformed under the action of an external force. And tighten the shielding layer 72.

Referring to FIG. 3 , a through second wire hole 32 is formed on the fixing member 30 , and the cable 70 can pass through the second wire hole 32 . The fixing member 30 can be inserted into the first wire hole 12 along the insertion direction A from the outside of the encoder housing 10 , and the fixing member 30 is interference-fitted and fixed with the encoder housing 10 after being inserted into the first wire hole 12 . The first O-ring 40 can be sleeved on the fixing member 30 , and the first O-ring 40 can deform and seal the gap between the fixing member 30 and the encoder housing 10 after the fixing member 30 is inserted into the first wire hole 12 In order to achieve the sealing effect of IP67 level.

Referring to FIG. 3 , the second O-ring 50 is disposed in the second wire hole 32 and can be sleeved on the cable 70. The second O-ring 50 can deform and seal the gap between the fixing member 30 and the cable 70 to achieve IP67 level sealing effect. The second O-ring 50 can also apply elastic force to the metal ring 20 after the fixing part 30 is inserted into the first wire hole 12, and the elastic force keeps the metal ring 20 against the encoder housing along the insertion direction A of the fixing part 30 10. In the exemplary embodiment, the second O-ring 50 applies force directly to the ferrule 20 . However, it is not limited thereto, and in other exemplary embodiments, the second O-ring 50 may also indirectly apply force to the metal ring 20 through other components. When the encoder is in use, the encoder housing 10 will be grounded, and the shielding layer 72 of the cable 70 can be connected to the encoder housing 10 through the metal ring 20 to achieve grounding, thereby enhancing the ability to shield electromagnetic interference.

When assembling the cable outlet structure of the encoder provided by the present invention, the first O-ring 40 is sleeved on the fixing member 30 first, and then the cable 70 is sequentially passed through the fixing member 30, the second O-ring 50, and the metal ring 20 and encoder housing 10. Applying a force on the metal ring 20 deforms the metal ring 20 and tightens the shielding layer 72 . The fixing member 30 is inserted into the first wire hole 12 for fixing, the first O-ring 40 can seal the gap between the fixing member 30 and the encoder housing 10, and the second O-ring 50 can seal the fixing member 30 and The gap between the cables 70. At the same time, the fixing member 30 abuts against the second O-ring 50 and the metal ring 20 along the insertion direction, so that the metal ring 20 is kept against the encoder housing 10 , thereby fixing the cable 70 . The outlet structure provided by the present invention does not need to protrude from the encoder housing 10, and also has IP67-level sealing effect and electromagnetic interference shielding ability, and has a more compact structure, and reserves a large bending space for the encoder outlet.

In an exemplary embodiment, referring to FIG. 2 and FIG. 3 , the outer surface of the encoder housing 10 is a plane perpendicular to the insertion direction A of the fixing member 30 around the opening of the first wire hole 12 , and when the fixing member 30 is inserted Behind the first wire hole 12 , the surface of the fixing member 30 facing the outside of the encoder housing 10 is coplanar with the outer surface of the encoder housing 10 . In this way, it is convenient to observe whether the fixing member 30 protrudes from the encoder housing 10 , so as to judge whether the fixing member 30 is installed in place or slips out. This structure can also ensure that the outlet structure is beautiful.

In an exemplary embodiment, referring to FIG. 3 , the encoder housing 10 has an abutment surface 14 in the first wire hole 12 that is perpendicular to the insertion direction A of the fixing member 30 and faces the outside of the encoder housing 10 . The two O-rings 50 can apply elastic force to the metal ring 20 along the insertion direction A of the fixing member 30 , and the elastic force keeps the metal ring 20 against the abutting surface 14 . The abutting surface 14 can stably support the metal ring 20 , thereby ensuring a stable position of the metal ring 20 .

In an exemplary embodiment, referring to FIG. 3 , the fixing member 30 shrinks to form an abutting portion 34 at the opening at one end of the second wire hole 32 , and the diameter of the second wire hole 32 at the abutting portion 34 is equal to the diameter of the cable 70 , After the fixing member 30 is inserted into the first wire hole 12 , the abutting portion 34 can abut against the second O-ring 50 along the insertion direction A of the fixing member 30 . The abutting portion 34 can narrow the gap between the fixing member 30 and the cable 70 , and at the same time, the fixing member 30 can uniformly apply force to the second O-ring 50 through the abutting portion 34 .

In an exemplary embodiment, referring to FIG. 3 , the first wire hole 12 has a fixing hole segment 13 , the cross section of the fixing hole segment 13 perpendicular to the insertion direction A of the fixing member 30 is circular, and the diameter of the cross section is along the direction of the fixing member. The insertion direction A of 30 tapers gradually. This structure of the encoder housing 10 is convenient for processing, and can facilitate the insertion of the fixing member 30 .

Fig. 4 is a schematic structural view of the fixing member. Referring to FIG. 3 and FIG. 4 , the fixing member 30 is in the shape of a truncated cone, and the second wire hole 32 is coaxial with the fixing member 30 . This structure of the fixing member 30 facilitates processing and can facilitate insertion into the first wire hole 12 .

In an exemplary embodiment, referring to FIG. 3 and FIG. 4 , the fixing member 30 is formed with a first annular groove 35 coaxial with the fixing member 30 on the side, and the first O-ring 40 is sleeved in the first annular groove. 35. When the fixing member 30 is inserted into the first wire hole 12 , the first annular groove 35 can prevent the first O-ring 40 from sliding relative to the fixing member 30 to affect the sealing effect. This increases the sealing effect between the fixing part 30 and the encoder housing 10 .

In an exemplary embodiment, referring to Fig. 3 and Fig. 4, the fixing part 30 is formed with a second annular groove 36 coaxial with the fixing part 30 on the side, after the fixing part 30 is inserted into the first wire hole 12, the second The annular groove 36 and the inner surface of the first wire hole 12 enclose a sealed cavity 37 . The fixing part 30 is also formed with two communication grooves 38 on the side. After the fixing part 30 is inserted into the first wire hole 12, each communication groove 38 and the inner surface of the first wire hole 12 enclose a communication cavity 39, each communicating with the inner surface of the first wire hole 12. The cavity 39 communicates with the sealing cavity 37 and the surface of the fixing member 30 facing the outer side of the encoder housing 10 . After the fixing part 30 is inserted into the first line hole 12, the sealant can be injected into the seal cavity 37 through a communicating cavity 39, and the other communicating cavity 39 is used to discharge air. The sealing effect between the fixing part 30 and the encoder housing 10 .

Fig. 5 is a schematic partial cross-sectional view illustrating another exemplary embodiment of an encoder outlet structure. Referring to Fig. 5, the same or similarities between the outlet structure in this exemplary embodiment and the outlet structure in Fig. 3 will not be repeated, the difference is that the outlet structure also includes an abutment ring 60, and the inner diameter of the abutment ring 60 is smaller than The outer diameter of the metal ring 20 and the second O-ring 50 , the outer diameter of the abutment ring 60 is larger than the outer diameter of the metal ring 20 and the second O-ring 50 . The abutment ring 60 is disposed in the second wire hole 32 and can be sleeved on the cable 70 , and the abutment ring 60 is disposed between the second O-ring 50 and the metal ring 20 along the insertion direction A of the fixing member 30 . The second O-ring 50 can apply elastic force to the abutment ring 60 , which abuts against the metal ring 20 and keeps the metal ring 20 against the encoder housing 10 . The abutment ring 60 can prevent the second O-ring 50 from slipping between the metal ring 20 and the second wire hole 32 , thereby improving the sealing effect of the wire outlet structure.

The present invention also provides an encoder. Referring to FIG. 1 to FIG. 5 , the encoder includes a cable 70 and the above-mentioned outlet structure. The cable 70 can pass through the first wire hole 12, the metal ring 20 is arranged in the first wire hole 12 and can be sleeved on the shielding layer 72 of the cable 70, the metal ring 20 can deform under the action of an external force and tighten the wire The shielding layer 72 of the cable 70, the cable 70 can pass through the second wire hole 32, the second O-ring 50 is arranged in the second wire hole 32 and can be sleeved on the cable 70, the second O-ring 50 can seal the fixing member 30 and the gap between the cable 70. The outgoing wire structure of the encoder is more compact, and a large bending space is reserved for the outgoing wire of the encoder.

It should be understood that although this description is described according to various embodiments, not each embodiment only includes an independent technical solution, and this description of the description is only for clarity, and those skilled in the art should take the description as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation or Changes, such as combination, division or repetition of features, should be included in the protection scope of the present invention.

Claims (10)

1. The outlet structure of encoder, its characterized in that includes:

an encoder housing (10), said encoder housing (10) being formed with a first wire hole (12) therethrough, through which first wire hole (12) a cable can be passed;

the metal ring (20) is arranged in the first wire hole (12) and can be sleeved on the shielding layer of the cable, and the metal ring (20) can deform and pinch the shielding layer under the action of external force;

a fixing member (30), wherein a second wire hole (32) is formed on the fixing member (30), the cable can pass through the second wire hole (32), and the fixing member (30) can be inserted into the first wire hole (12) from the outer side of the encoder housing (10) in an interference manner to be fixed;

-a first O-ring (40), said first O-ring (40) being able to fit around said fixture (30), and said first O-ring (40) being able to seal a gap between said fixture (30) and said encoder housing (10) after insertion of said fixture (30) into said first wire hole (12); and

a second O-ring (50), said second O-ring (50) being disposed in said second wire hole (32) and being capable of being sleeved on said cable, said second O-ring (50) being capable of sealing a gap between said fixture (30) and said cable, and said second O-ring (50) being capable of applying an elastic force to said metal ring (20) after said fixture (30) is inserted into said first wire hole (12) such that said metal ring (20) is held against said encoder housing (10).

2. The outlet structure of an encoder according to claim 1, further comprising an abutment ring (60), wherein an inner diameter of the abutment ring (60) is smaller than an outer diameter of the metal ring (20) and an outer diameter of the second O-ring (50), wherein an outer diameter of the abutment ring (60) is larger than an outer diameter of the metal ring (20) and an outer diameter of the second O-ring (50), wherein the abutment ring (60) is disposed in the second wire hole (32) and is capable of being sleeved on the cable, and wherein the abutment ring (60) is disposed between the second O-ring (50) and the metal ring (20) in an insertion direction of the fixture (30).

3. The wire outlet structure of an encoder as claimed in claim 1, characterized in that the encoder housing (10) has an abutment surface (14) in the first wire hole (12) perpendicular to the insertion direction of the fixing member (30) and facing the outside of the encoder housing (10), and the second O-ring (50) is capable of applying an elastic force to the metal ring (20) in the insertion direction of the fixing member (30) to hold the metal ring (20) against the abutment surface (14).

4. The wire outlet structure of an encoder as claimed in claim 1, characterized in that the fixing member (30) is contracted at an end opening of the second wire hole (32) to form an abutment portion (34), the diameter of the second wire hole (32) at the abutment portion (34) being equal to the diameter of the wire, the abutment portion (34) being capable of abutting against the second O-ring (50) in the insertion direction of the fixing member (30) after the fixing member (30) is inserted into the first wire hole (12).

5. An outlet structure of an encoder according to claim 1, characterized in that the first wire hole (12) has a fixing hole section (13), a cross section of the fixing hole section (13) perpendicular to the insertion direction of the fixing member (30) is circular, and a diameter of the cross section is gradually reduced along the insertion direction of the fixing member (30).

6. The outlet structure of an encoder according to claim 5, characterized in that the fixing member (30) is of a truncated cone shape, and the second wire hole (32) is coaxial with the fixing member (30).

7. The outlet structure of the encoder as claimed in claim 6, characterized in that the fixing member (30) is laterally formed with a first annular groove (35) coaxial with the fixing member (30), and the first O-ring (40) is sleeved on the first annular groove (35).

8. The outlet structure of the encoder as claimed in claim 6, characterized in that the fixing member (30) is laterally formed with a second annular groove (36) coaxial with the fixing member (30), the second annular groove (36) and the inner surface of the first wire hole (12) enclosing a sealing chamber (37) after the fixing member (30) is inserted into the first wire hole (12); the fixing piece (30) is further provided with two communication grooves (38) on the side face, after the fixing piece (30) is inserted into the first wire hole (12), the communication grooves (38) and the inner surface of the first wire hole (12) enclose a communication cavity (39), and the communication cavities (39) are communicated with the sealing cavity (37) and the surface, facing the outer side of the encoder shell (10), of the fixing piece (30).

9. The wire outlet structure of an encoder according to claim 1, characterized in that the outer surface of the encoder housing (10) is a plane perpendicular to the insertion direction of the fixing member (30) around the opening of the first wire hole (12), and that the surface of the fixing member (30) facing the outside of the encoder housing (10) is coplanar with the outer surface of the encoder housing (10) after the fixing member (30) is inserted into the first wire hole (12).

10. An encoder, comprising:

a cable (70); and

the wire outlet structure according to any one of claims 1 to 9, wherein the cable (70) can pass through the first wire hole (12), the metal ring (20) is arranged in the first wire hole (12) and can be sleeved on the shielding layer of the cable (70), the metal ring (20) can deform under the action of external force and can pinch the shielding layer (72) of the cable (70), the cable (70) can pass through the second wire hole (32), the second O-ring (50) is arranged in the second wire hole (32) and can be sleeved on the cable (70), and the second O-ring (50) can seal a gap between the fixing piece (30) and the cable (70).